Some few are rated at less - maybe 500 mAh and a few at higher. Modern USB phone chargers which have a USB plug as their output and which plug into a device's USB port are chargers in their own right. A charger capable of charging a phone at 5V, 2A will almost certainly also charge a tablet OK at 5V, 2A.
The more months payed for upfront, the cheaper the cost per month. E-liquid subscriptions range in price form $29.99 paid monthly, $86.97 paid every three months or $167.94 paid every six months. All three plans include shipping in the price.
Cheap Diaper Bag Organizers. The average price for pouches or inserts is around the $10-15 range with some as low as $5-6 and some as high as $40-50 for a range known as sugarSNAP Files. Therefore I believe there is a budget range that will be able to take care of most people.